Links

Classifications

G03G15/00—Apparatus for electrographic processes using a charge pattern

G03G15/06—Apparatus for electrographic processes using a charge pattern for developing

G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer

G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller

G03G15/0813—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by means in the developing zone having an interaction with the image carrying member, e.g. distance holders

G—PHYSICS

G03—PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY

G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

G03G15/00—Apparatus for electrographic processes using a charge pattern

G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies

G03G15/0105—Details of unit

G03G15/0126—Details of unit using a solid developer

G—PHYSICS

G03—PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY

G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

G03G15/00—Apparatus for electrographic processes using a charge pattern

G03G15/06—Apparatus for electrographic processes using a charge pattern for developing

G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer

G03G15/0887—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Abstract

PURPOSE: To minimize the influence between deposited toners and next provided toners and to enable the simultaneously transfer of multicolor images without color mixing and staining of the images and developers by vibrating the toner supporting surface of a toner donating member by means of a piezoelectric element. CONSTITUTION: Image forming beams 15, 16 come into contact with a photoreceptor 20 at exposure points 33, 34 apart by a prescribed distance L so selected as to respectively meet the color developers. A developing device 200 has a piezoelectric polymer belt 205 spanned between rollers 210 and 215. The belt is electrostatically charged by the DC bias impressed by a power source 225 to move toners from a magnetic brush type toner loading device 220 as the toner donating member to the roller 215 in contact with the photoreceptor 20. The roller 215 is acoustically vibrated by the piezoelectric effect of an AC power source 230 to lower the adhesive power of the toners. The toners are thus attracted and adhered selectively to the desired developing parts of the photosensitive 20, by which the latent images are developed. The simultaneous transfer of the multicolor images is thus made possible.